Wiper arm



FIG. 1 is a perspective view of a wiper arm showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is an enlarged detail of the wiper arm; and,

FIG. 7 is the opposite view of the enlarged detail of the wiper arm. 

The ornamental design for a wiper arm, as shown and described. 